The key I think is the wording about "designated" shells. Many of the custodianship plays are shells in that they have no operations but are not designated as a "shell" on OTC Markets.
That actually makes me think that, instead of rushing to get pink current, we may see some of these companies instead do whatever paperwork is required to get the "shell designation" by 9/28 to keep trading. I don't know what that requires but I would not be surprised if it were substantially less effort and expense than what is required to get picnk current. I also would not be surprised to see the custody guys (Synergy, Lazar, et al) work with some of their target companies to get the shell designation in place.
If I could afford to buy all of them, I would not need to buy any of them and I sure wouldn't be spending time on the message boards!